# Atmel EDBG-based Tools Protocols
Protocol Commands

### Activate Physical

Activates the selected physical interface, if necessary, and makes contact with the target interface. If no interface is detected, a FAILED response is returned. If it is possible to read out the device ID, then this value is returned (length depends on the interface). If not, a simple OK is returned.

Table 102. Activate Physical command format

Field | Size | Description
--- | --- | ---
RSP_AVR8_ACTIVATE_PHYSICAL | 1 byte | Command ID
Version (0x00) | 1 byte | Command version
Reset | 1 bytes | 0x00: no NOT use external reset 0x01: apply external reset during activation

Responses:

- OK

- DATA

- FAILED

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